Buying my first road bike

[Trek420]

I am looking into road bikes... I have been going to cycle classes for a few years and would like to now try outdoor cycling.

I am 5'0 ... I believe I am a size 44cm. I am a college student and i am looking for suggestions and tips...

We've had many threads about looking for a bike that fits us vertically challenged women riders. Here's one of my favorites:

http://forums.teamestrogen.com/showthread.php?t=12441